National Botanic Garden of Belgium\nNationale Plantentuin van België. (1999). Systematics and Geography of Plants. National Botanic Gardens.
Cita Chicago Style (17a ed.)National Botanic Garden of Belgium\nNationale Plantentuin van België. Systematics and Geography of Plants. Meise, Belgica: National Botanic Gardens, 1999.
Cita MLA (8a ed.)National Botanic Garden of Belgium\nNationale Plantentuin van België. Systematics and Geography of Plants. National Botanic Gardens, 1999.
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